When proteins undergo deamination,the waste substance found in the urine is mostly ________.

Question

Quizplus · Accepted Answer

Deamination is the removal of an amino group (-NH2) from an amino acid. The resulting waste substance is ammonia (NH3), which is toxic to the body. However, the liver quickly converts ammonia into urea, which is less toxic and more water-soluble. Urea is then excreted by the kidneys and is the primary nitrogenous waste product found in urine. Therefore, the waste substance found in urine after protein deamination is mostly urea (Choice C).

When Proteins Undergo Deamination,the Waste Substance Found in the Urine